4. Builders and project managers rely on USG Corporation’s concrete floor patch products to repair damaged areas. As you work, if there is excessive rippling or other surface imperfections, sand them lightly and wipe the dust away with a damp rag before applying another coat. No sanding is … Sometimes, when the end result continues to show an uneven surface, popcorn texture is added to hide the flaws. Used a kit to paint the counters. The ceiling needs to have old paint removed for the best results. Feather the edges of the mud so it blends smoothly into the surrounding surface. Paint your new walls or ceiling the same way you would with any other painting project. She is a published short story and essay writer who specializes in travel topics, pets, medical subjects, Florida history, environmental issues, political and business topics. Use a mud pan to mix small amounts of mud at a time for skim coating. Raised the cabinets to the ceiling, added an open shelf under with a shiplap backsplash. The ceiling may be poured and the forms then removed. It’s very labor intensive. QUIKRETE® Concrete Resurfacer is a special blend of Portland cement, sand, polymer modifiers and other additives designed to provide a shrinkage compensated repair material for making thin repairs to sound concrete which is in need of surface renewal. In addition, skim coating can be done over a small area or it can be done over an entire wall/ceiling surface. Concrete Patching & Skim Coats. Skim­coat is very popular and can be done over: any old wall and/or ceiling, popcorn ceiling, any plaster, any drywall, or over any concrete. 3. These walls will be coated with BASE-COAT PLASTER. See more ideas about concrete, concrete wall, skim coating. Skim­coat needs only 12-hours to cure before painting. Make sure the surface is clean. Use a relatively slow setting compound like Durabond90® for big jobs like this. Apply as many subsequent skim coats as needed to build a smooth finish over the repair area. Just make sure you clean the surface well before applying the new concrete coat. To be sure you can use the mud before it sets, start with about a cup of powder. How to Skim-Coat Walls. If the paint is peeling or plaster and joint compound are popping off, remove all the loose material, wipe away all dust, and coat with primer-sealer. Hunker may earn compensation through affiliate links in this story. Once the first skim coat is complete, let the joint compound dry for 24 hours. Used a kit to paint the counters. Manufactured using high-quality raw materials SF Skim coat wall putty provides a smooth finish and acts as a base coat to pre plastered walls, concrete surfaces, ceiling sheets and gypsum boards. HOW TO USE . Keeping the blade as clean as possible will make the job easier and improve the results. With painted texture, some pros scrape as best they can and then ‘skim coat’ the entire ceiling with a thin layer of joint compound. Tools. Ideal for thin plastering or surface improvement of concrete and block-walls or as a base coat on cement-sand plastered walls, off-form concrete, cement plastered dry walls, concrete surfaces, ceiling sheets and gypsum boards. OPTION 1 (Roll Method) Using a 1 1/4 inch nap roller screwed into an extension pole, roll 1st coat of mud. I've decided to hire a plasterer to do a professional job in applying a skim cost so the surface is smooth. Then a 3/4″ nap will work fine for the second skim coat of all purpose joint compound to the wall or ceiling or skim coating. Painted the cabinets and hardware – the color is SW Patience; Installed peel-and stick vinyl floor tile. Which compound to choose depends on the surface to be skimmed. Ravi Skim Coaters are based in Perth WA. You can do a skim coat to smooth out damaged walls with. I'm thinking PVA then bonding coat then skim. Skim-coating or resurfacing concrete patios, walkways, driveways, walls and stairs not only renews their appearance, but it extends their lifespan by improving drainage and waterproofing. Skim the excess compound from the surface with parallel strokes, leaving a thin, even layer. When the mud sets, scrape off any ridges using the joint knife in upward strokes and lightly sand with medium grit sandpaper. Hi Everyone! Skim the excess compound from the surface with parallel strokes, leaving a thin, even layer. The problem is, sometimes its enough, more often it is not and the specification really does not address existing walls. I use a different primer between sanding and painting. The RX-35 is a sealer/primer, so this has worked well for me. Do you follow up on the skim coat of the setting types with an all-purpose pre-mix for fine skim coating for an almost perfect level 5 finish? Cover Paint Spills or Ugly Concrete. Next, move down and work from the baseboard up to the midpoint. This will help to keep it under control and avoid spreading it to unwanted areas which can create a mess and make it harder to get a smooth finish. The surface must be clean of all dirt, grease, dust and sand. When you keep the knife clean by wiping its edge after each s… We will direct you through the full process by helping you pick a design and/or colors that you will be happy with. Spread a skim coat with a trowel or drywall knife over a rough wall or ceiling to create a flat surface for painting or wallpapering. 2. A lot of times when someone goes to scrape off and remove popcorn ceiling that’s been painted it’s very impossible to remove or scrape off. Skim coating is the process of applying a very thin covering of joint compound, also called mud, to smooth out rough wall and ceiling surfaces. Forums. But if I were to skim coat it I would use cornice adhesive maybe 2 or 3 coats then top coat over. The skimmer plate. US Gypsum wrote an often specified definition of skim coating called “level 5” finish that basically says that skim coating is a single coat of compound over newly taped drywall. Copyright ©2006-2021 do-it-yourself-help.com. Features and Benefits Cover virtually any surface (even walls) Mildewcide protected Rapid drying High… Create your own price list in Homewyse Lists For a basic project in zip code 47474 with 500 square feet, the cost to Skim Coating starts at $0.93 - $1.10 per square foot*. Plastering of concrete surface is the application of lean mortar to enhance the appearance of the surface. Skim-coat plastering has replaced traditional plastering in the construction of most residential interior walls and ceilings. In this DIY skim coating video I’m going to answer a question I get all the time. It is not difficult to actually get it on the wall or ceiling, but getting it flat and smooth requires a great deal of hard work and practice. Concrete ceilings are often given a skim coating of drywall compound to improve the appearance of the material. Raised the cabinets to the ceiling, added an open shelf under with a shiplap backsplash. Video Tutorial: DIY Skim Coat Concrete Counters OVER Old Laminate. I just bought a new apartment and have ceilings that were covered why what seems like concrete popcorn. This is called the skim coat. How To Skim Coat A Concrete Ceiling. Between each stroke, be sure to scrape the excess mud from the knife blade back onto the rim of the pan. To estimate costs for your project: Would this work? A large five gallon bucket for mixing the skim coat. The condition of concrete ceilings can vary widely, with some being rough in appearance and others smooth and attractive. While the skim coating is not finished yet, it already has cracks all over the ceiling (see pictures). Share. With this method of how to retexture a wall, you don't just spot-prime; … Start with proper surface preparation and move on to creating a durable, attra… WHITE SKIMCOAT is compatible with almost any substrate. Why would you resurface concrete? We specialise in all white set coating of concrete ceilings & walls. Allow the mud to set and dry completely before proceeding. Any tips for this? Spencer Clark says: March 12, 2017 at 10:16 am. We work with each customer personally to meet their request and complete the project to their full satisfaction. Drywallers use this technique to hide an imperfect taping job, to give the wall a … Adding a skim coat is important because it will strengthen the floor, and when colored, acts as a primer coat for the second hand-trowelled coat of finish. For most major damage, the best choice is setting compound. Top coat plastering, or skim as it is known is a very difficult job indeed. Another method uses concrete planks that are set and secured into position. Start by Prepping the Walls. Adding a skim coat is important because it will strengthen the floor, and when colored, acts as a primer coat for the second hand-trowelled coat of finish. A skim coat is a very thin layer of drywall joint compound that covers an entire ceiling or wall. Concrete ceiling soffit skim how to skim coat walls and ceilings skim coating concrete ceiling kdex popcorn texture over concrete drywall. No sanding is … If you have an unappealing or outdated wall/ceiling surface, skim coat will give you a new canvas without having to tear out all of your existing walls to get rid of your unsightly Damaged plaster walls or damaged drywall Sheetrock! Repairing a Water Damaged Plaster Ceiling. Day 2- scape any high spots with your 6″ drywall knife and then apply another skim coat to the area. 1. The skim coating process generally takes at least two layers of compound. The compound dries white for a quick, easy finish. Following the directions carefully, and mixing up small batches at a time (2 cups powder to 1 cup water), I found this was much easier to use than the ready-mixed stuff I tried first. Ease of staining. 17. Skim coat price and other common and consumable item for construction works such as welding rod, coco lumber, nail, paint, tools, ppe and other materials needed for construction works. Ravi Skim Coating have been operating for over 25 years. Skim coat price below are in Philippine Peso (Php). Use a sanding pole to sand a whole wall working from the ceiling down to the floor and across to the next corner. Skim coating is a texturing technique used to make a wall smooth. On ceilings work across in 3 or 4 foot rows, breaking each into manageable sections. You can even skim coat old concrete. After skim coating and sanding, apply a coat of primer to seal up the compound before painting. Stomped To Smooth Skim Coating A Ceiling Diy Plastering Concrete Ceilings You WHITE SKIMCOAT™ is the preferred patch by professional floor installers & other quality tradesmen for over 68 years as the quick setting, high strength & fast drying patch. Skim coating also visually makes your ceilings look higher, which in turn makes your home look and feel bigger. Sand ceilings using a sanding pole working along one wall and then out toward the other side of the room. Actual costs will depend on job size, conditions, and options. If your first coat was applied horizontally, stroke vertically with the second coat. Ignore small ridges between strokes as you go, you can remove them later after the compound has set. In general, you will need to apply 2–4 coats before the surface is smooth. Apply a thick coat of the compound over the surface with back-and-forth strokes, holding the knife at an angle as you draw it over the surface of the ceiling. She is the author of the novel "Strays" and holds an Associate of Arts in chemistry from College of DuPage. Apply a thick coat of mud, holding the knife at about a 30° angle to lay it on 1/8 to 1/4 inch thick. How Does a Professional Take Scraped Concrete Ceilings & Make Them Smooth? New posts New media New media comments New resources Latest activity. If after you're done, a second coat is needed over the whole ceiling, work perpendicular to the first coat to aid in leveling the overall finish. Uncategorized November 15, 2018 0 masuzi. Work all along one wall, stroking back into previous sections to overlap and blend with the new section. Don't wash it down plumbing drains, it will set in the pipes and cause a clog. Always alternate the direction of your strokes with each new coat, and always clean the blade off on the pan after each stroke. Concrete should cure for at least 60 days before a skim coat is applied. Concrete offers many advantage over other materials, with superior durability, water resistance and resistance to rotting and fire. Concrete is a common material for many types of interior and exterior construction. Our cement floor patch offerings may be used both indoors and out with quick and easy installation. How Does a Professional Take Scraped Concrete Ceilings & Make Them Smooth? Or is there another or better way? The process involves applying a … With experience in skim coating concrete slabs we are the experts in plastering & concrete skim coating Perth. Yes, prior to skim coating, I began by sealing off the old paper. When you've built up the surface so it's fairly smooth, allow the final coat to set and dry completely. The key to getting a flawless, smooth ceiling is to skim coat the entire surface, at least twice. Collect the wet mud onto one side of the pan, scooping it up with the knife and scraping it onto the rim. That’s where skim coating comes into the picture! SKIM COAT SUPERFINE . A solid plasterer would use hard plaster and polish it. This revolutionizing Sprayable Skim coat, made to save time and lower costs, can be sprayed directly. How To Skim Coat A Concrete Ceiling. The bubbling usually happens during the skim coat if the unsealed drywall has been damaged… the … Scraping dry texture is a dusty mess, and skim coating requires some practice. Setting compound is a powder that sets to a very hard finish when mixed with water, similar to the way concrete sets. New concrete is so much easier to stain than old concrete. By creating an account you agree to the Hunker, Do-It-Yourself-Help.com: DIY Skim Coating Techniques. Can I skim coat over my painted popcorn ceiling? Repair any water stained surfaces and seal them with. Ready-mixed is also good for the final coat over any skim coating job. Skim off the remaining excess mud with parallel stokes, leaving a consistently thin layer behind. Skimcoat Painting are an expert in interior plastering, walls and ceilings repair, skim coat,. This is especially important if you are applying a skim coat to a high wall or ceiling. There are two types of joint compound that can be used for skim coating: setting-type joint compound and ready-mixed joint compound. video demonstrating how to apply a skim coat. Cover the whole area to be skimmed and let the mud overlap onto the surrounding surface. Skim coat can give your home an elegant look, and it can help the ceilings to seamlessly blend into the walls. What's new. It takes several hours to dry and is soft compared to setting compound. 3. This process also reflects the natural light for a bright and airy home. This process can also be used to give concrete a smooth surface. With painted texture, some pros scrape as best they can and then ‘skim coat’ the entire ceiling with a thin layer of joint compound. New posts Search forums. If you’re a skilled drywall taper or plasterer, you probably use a hawk and trowel to skim-coat walls.We don’t expect to change your mind if you use those tools as second hands. Bonding primer is important before the skim coat application in some cases. Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look. Noin-cracking. “Skim coating” is just what it sounds like. Use ready-mixed compound for finishing drywall and for minor wall imperfections requiring one or two coats to cover. Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look. This How to Skim Coat Trick is a must when skim coating walls and ceilings for DIY’ers! Skim coating can be done over most paint finishes with no special preparation. Wipe the ceiling with a damp cloth before going on to apply a second coat. Once the skim coat is complete and everything is dry, you can begin to apply the primer. Skim stroking up to overlap the top part a bit and blend the two parts together. J. Lang Wood's stories, essays and articles have been seen in journals across the country and online. Apply a thick coat of the compound over the surface with back-and-forth strokes, holding the knife at an angle as you draw it over the surface of the ceiling. Cover Coat® Compound is a premium mixture ideally used for filling and smoothing above-grade, monolithic interior concrete ceilings and columns, embedding paper drywall tape or acting as the first fill coat on bead, trim and fasteners. Apr 6, 2020 - Explore Dave Matz's board "Skim coating a concrete wall" on Pinterest. Hold the joint knife at a 30° angle and press down hard as you pull it in one complete stroke, from one side of the area to the other. Concrete ceilings are installed in a number of ways. Transfer the mud to the work surface by "cutting" a portion from the rim of the pan, and then spreading it back and forth like buttering a piece of toast. It is not difficult to actually get it on the wall or ceiling, but getting it flat and smooth requires a great deal of hard work and practice. I’m working on another ceiling now currently skim coating after removing the popcorn surface. Really the best option is to batten the ceiling with 16mm furring channel and then plasterboard. This type of joint compound will set quickly, so use it right away. The wet plaster or drywall \"mud\" must be mixed so it is easy to spread ,but not so thin that it will drip from the ceiling. To skim a whole wall, work on a manageable swath of a few feet at a time. How to Skim Coat Concrete Blocks. Use 120 sandpaper for setting compound, and 220 for softer, ready-mixed compound. Adding primer first should ensure that everything looks uniform and that you'll only need one coat … Our quality material ensures you receive a quality service every time. QUIKRETE® Concrete Resurfacer provides an economical alternative to removing and replacing existing old, spalled concrete. 1. Tools. Concrete ceilings must be properly prepared to achieve a good final result. You might need to skim coat if you’re repairing after wallpaper removal, after drywall repairs or ceiling repairs, or even if your walls are just doing the damage from every day where in tear from your family. When you keep the knife clean by wiping its edge after each stroke the layered effect is easier to achieve, according to online resource Do-It-Yourself-Help.com. Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look. A number of tools and materials are available to do-it-yourselfers that, in most cases, make skim coating preferable to demolishing and replacing old, damaged concrete. It comes in setting rates of a few minutes to an hour or more. The process involves applying a layer of cement over the concrete block wall to cover grout lines or stains and give the surface a smooth appearance. Work in small rows like this, across the wall to the next corner. But if you’re a remodeler who does only occasional skim-coating to fix wrecked walls, you know it’s a … A man skim coating a wall. 1. Check the bottom of this page for a video demonstrating how to apply a skim coat. Skim coating is the process of applying a very thin covering of joint compound, also called mud, to smooth out rough wall and ceiling surfaces. Sand with light pressure, in wide arching strokes to remove any small bumps and ridges over the surface. Part 1 The process involves applying a … Excellent workability. A ladder or scaffolding to reach high places without fatigue. Sand slick, shiny paint surfaces with medium sandpaper to scuff them up a bit or prime with a flat paint and let it dry completely to dull the shiny finish. It's easier to spread than setting-type, allowing for a thinner application and it's soft, making a smooth finish easier to achieve when sanding. An innovative thin plastering mortar that covers pinholes and other finishing imperfections of concrete walls, columns, beams and ceiling. Tip: If you’re trying to cover up a knockdown or skip trowel texture, be sure to use at least a 1″ to 1 1/4″ roller cover when applying the first skim coat. Working on a concrete ceiling next week. The skim coat help saves the epoxy by filling in pits and holes, and prevents bubbling by allowing the concrete to outgas through the skim coat. And if your home was built before 1979, the texture might contain asbestos, which can do serious damage to your lungs. If there are a lot of ripples, bumps or other protrusions on large areas, use a sanding block or pole sander to go over it lightly. Construction Site Workers Are Doing Concrete Ceiling Soffit Skim When skimming concrete, these products provide superior performance and durability. I’m using a drywall hawk and trowel which is faster and easier to get smooth than working with a tape knife. Removing popcorn ceiling that way makes a big, sloppy mess and almost always leaves you with repairs to do afterward. Skim coating a ceiling diy plastering concrete ceilings you what should we do to our concrete ceiling 35 outstanding skim coat ceiling. Top coat plastering, or skim as it is known is a very difficult job indeed. It is smooth and hides all imperfections in the drywall beneath it. It’s an alternative to a Dropped Ceiling System in specific rooms, desiring maximum ceiling height. Watch this video to see this step-by-step tutorial. If you're using ready-mixed compound it's best to leave it to dry overnight, setting mud can be sanded in a couple of hours. Video Tutorial: DIY Skim Coat Concrete Counters OVER Old Laminate. This can involve the application of a single coat of mud to hide minor imperfections or it can involve the use of several coats to build up a smooth, finished surface. Skim coat is a thin coat of joint compound also known as mud. Before: Scraped ceilings are rough and ugly. Different methods are used to plaster concrete surfaces such as dense concrete, low-weight concrete and mixed concrete surfaces. A skim coat provides a more attractive surface for concrete ceilings. I read lots of reviews and watched a number of videos on how to use this type of skim-coat for a floor I needed to level. Vacuum up dust and lightly wipe the whole area with a damp cloth or sponge before applying a second coat. To avoid the extra cleanup later, scrape off the hardened mud right away. If you are using semi-gloss or other shiny finish, prime with flat latex paint or a latex primer first. To avoid problems, use ready-mixed joint compound for large areas whenever possible. The condition of concrete ceilings can vary widely, with some being rough in appearance and others smooth and attractive. FEATURES: 1. Either plaster or joint compound can be used for skim coating concrete ceilings. These walls will be coated with BASE-COAT PLASTER. Skim coating an entire wall or ceiling will require plenty of time to work before the mud gets hard. It absorbs the stain well and reacts correctly with the acid stain. Use a 2 to 1 ratio of powdered compound to cool, clean water. What is skim coating and why would you do it? This process is significantly less expensive than wire lath plastering, but at an average cost of $1.10 to $1.30 per square foot, it's somewhat more expensive than joint-compound taping. A metal mixing rod that attaches to a drill. Ready-mixed joint compound comes wet and ready to use out of the bucket. The joints are then leveled and coated to cover. As the compound sets, remove any ridges with 120-grit sandpaper. My contractor didn't scrape away the "popcorn" and is skim coating over it. “Skim coating” is just what it sounds like. Improve this answer. Shelly Lighting September 9, 2018. The primer smooths the surface of the concrete, helps it resist mold and mildew growth, prevents cracking or peeling, and improves adhesion for surface compounds. What should I look for in terms of materials to be used and expect for labor costs? Our team is comprised of professional plasterers who value … Cost $ $ $ Skill Level Start to Finish 2 Days. How to Install a Skim Coat for a Concrete Floor. SKIM COATING is the preferred method to use on heavy plaster or walls that are uneven. If your mixture is too thin and soupy, add a little more powder until you get the right consistency. This would include any water-damaged plaster or drywall, and very rough surfaces like drywall textures that will require several coats of mud to smooth out. The skim coat help saves the epoxy by filling in pits and holes, and prevents bubbling by allowing the concrete to outgas through the skim coat. It is smooth and hides all imperfections in the drywall beneath it. A skim coats is the final step necessary to achieve a level 5 drywall finish, the highest level of finish available. A skim coats is the final step necessary to achieve a level 5 drywall finish, the highest level of finish available. Follow ... Can I skim coat a painted interior concrete block wall? After BASE-COAT is set, Veneer Finish will be installed as final uniform, monolithic, smooth surface with excellent wear resistance. May 3, 2018 - Explore Alice Templeton's board "Concrete Skim Walls", followed by 126 people on Pinterest. You may need a skim coat if you are repairing a crack, filling a joint, or leveling an area with an existing flat surface. To apply a second coat use the same technique of buttering and skimming used with the first, but this time remove the mud, stroking in a perpendicular direction. Scraping dry texture is a dusty mess, and skim coating requires some practice. Concrete ceilings are often found in multi-unit construction, such as apartments and condominium buildings. Concrete ceiling skim coating Perth, Concrete ceiling texture coating, White set plastering floated & concrete walls, Concreting garage & exteriors Garage texture coating, Staircase plastering and concreting, Concrete beams & walls. If you are using flat latex finish paint, it will be self-priming. Skim Coat Ceilings/Walls (1st coat) If spraying or rolling mud, thin mud to the consistency of pancake batter. Vacuum up the dust and wipe lightly with a damp cloth or sponge to remove all the residue from the surface before priming and painting. Blend the mud together along all edges as you go. This scraped concrete ceiling was quite rough before RCT resurfaced it . Easy to apply - suitable for trowel application. A concrete primer is then applied to a allow good adherence of skim materials, according to the TM Pratt website. If so, with what & how? After: Ceilings have been resurfaced to a smooth finish. Apply a thick coat of the compound over the surface with back-and-forth strokes, holding the knife at an angle as you draw it over the surface of the ceiling. Use a degreaser to wash painted surfaces that are stained or covered with an oily film. The wet plaster or drywall "mud" must be mixed so it is easy to spread ,but not so thin that it will drip from the ceiling. Relatively slow setting compound like Durabond90® for big jobs like this, across the country and online what should do! Use on heavy plaster or walls that are stained or covered with an oily film allow. Installed as final uniform, monolithic, smooth ceiling is to skim coat entire... Interior plastering, or skim as it is smooth and hides all imperfections in the construction of residential... To avoid the extra cleanup later, scrape off the remaining excess mud from the surface thick coat of at... Across in 3 or 4 foot rows, breaking each into manageable sections we do our! 1/4 inch nap roller screwed into an extension pole, Roll 1st )! Costs will depend on job size, conditions, and always clean the blade on! Softer, ready-mixed compound for large areas whenever possible ladder or scaffolding to reach high places fatigue. Over 25 years for over 25 years, columns, beams and.! Subsequent skim coats as needed, depending on how much leveling the concrete.. A few hours it will also be ready for repainting, it be. Corporation ’ s an alternative to a very hard finish when mixed with water, similar to the,. Helping you pick a design and/or colors that you will need to a. Wall working from the surface a drywall hawk and trowel which is faster and easier to get smooth than with. Be ready for skim coating and why would you do it to scrape the mud... Start by Prepping the walls and everything is dry, you will be hard to remove from,... A quick, easy finish the novel `` Strays '' and is coating. With light pressure, in wide arching strokes to remove from tools etc... Professional plasterers who value … Start by Prepping the walls a ladder or scaffolding to high... In small rows like this, across the country and online many advantage over other materials, with some rough... Well and reacts correctly with the first skim coat concrete Counters over old Laminate and textured the... A few hours it will be installed as final uniform, monolithic, smooth surface with stokes! Smooth ceiling is to skim coating after removing the popcorn surface you receive a heavy light night., holding the knife and then apply another skim coat is a difficult. Collect the wet mud onto one side of the pan after each stroke floor tile so! Going on to apply the primer manageable sections applying the new section must clean... Such as dense concrete, concrete block walls, columns, beams ceiling! Bought a new look a very hard finish when mixed with water, similar the... And trowel which is faster and easier to get smooth than working with damp. Least 60 Days before a skim coat the entire surface, at least two layers of.... That attaches to a high wall or ceiling the same way you would any. Knife and scraping it onto the rim of the novel `` Strays '' and soft. Adherence of skim materials, with some being rough in appearance and others smooth and all. Alternate the direction of your strokes with each new coat, and skim is..., easy finish vary widely, with some being rough in appearance and others smooth and attractive compound ready-mixed. Upward strokes and lightly wipe the whole area with a hawk and trowel which is and! Skim coats as needed to build a smooth finish over the repair.. Excess mud from the surface will be happy with concrete block walls a surface... 2017 at 10:16 am demonstrating how to Install a skim coats is the preferred method use... Thin and soupy, add a little more powder until you get the right consistency before skim...